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461 lines
16 KiB
EmacsLisp
461 lines
16 KiB
EmacsLisp
;;; select.el --- lisp portion of standard selection support
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;; Maintainer: FSF
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;; Keywords: internal
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;; Copyright (C) 1993, 1994, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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;; Based partially on earlier release by Lucid.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;;; Code:
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(defcustom selection-coding-system nil
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"Coding system for communicating with other X clients.
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When sending text via selection and clipboard, if the target
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data-type matches with the type of this coding system, it is used
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for encoding the text. Otherwise (including the case that this
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variable is nil), a proper coding system is used as below:
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data-type coding system
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--------- -------------
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UTF8_STRING utf-8
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COMPOUND_TEXT compound-text-with-extensions
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STRING iso-latin-1
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C_STRING no-conversion
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When receiving text, if this coding system is non-nil, it is used
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for decoding regardless of the data-type. If this is nil, a
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proper coding system is used according to the data-type as above.
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See also the documentation of the variable `x-select-request-type' how
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to control which data-type to request for receiving text.
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The default value is nil."
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:type 'coding-system
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:group 'mule
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;; Default was compound-text-with-extensions in 22.x (pre-unicode).
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:version "23.1"
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:set (lambda (symbol value)
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(set-selection-coding-system value)
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(set symbol value)))
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(defvar next-selection-coding-system nil
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"Coding system for the next communication with other X clients.
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Usually, `selection-coding-system' is used for communicating with
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other X clients. But, if this variable is set, it is used for
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the next communication only. After the communication, this
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variable is set to nil.")
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;; This is for temporary compatibility with pre-release Emacs 19.
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(defalias 'x-selection 'x-get-selection)
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(defun x-get-selection (&optional type data-type)
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"Return the value of an X Windows selection.
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The argument TYPE (default `PRIMARY') says which selection,
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and the argument DATA-TYPE (default `STRING') says
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how to convert the data.
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TYPE may be any symbol \(but nil stands for `PRIMARY'). However,
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only a few symbols are commonly used. They conventionally have
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all upper-case names. The most often used ones, in addition to
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`PRIMARY', are `SECONDARY' and `CLIPBOARD'.
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DATA-TYPE is usually `STRING', but can also be one of the symbols
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in `selection-converter-alist', which see."
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(let ((data (x-get-selection-internal (or type 'PRIMARY)
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(or data-type 'STRING)))
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coding)
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(when (and (stringp data)
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(setq data-type (get-text-property 0 'foreign-selection data)))
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(setq coding (or next-selection-coding-system
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selection-coding-system
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(cond ((eq data-type 'UTF8_STRING)
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'utf-8)
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((eq data-type 'COMPOUND-TEXT)
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'compound-text-with-extensions)
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((eq data-type 'C_STRING)
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nil)
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((eq data-type 'STRING)
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'iso-8859-1)
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(t
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(error "Unknow selection data type: %S" type))))
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data (if coding (decode-coding-string data coding)
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(string-to-multibyte data)))
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(setq next-selection-coding-system nil)
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(put-text-property 0 (length data) 'foreign-selection data-type data))
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data))
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(defun x-get-clipboard ()
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"Return text pasted to the clipboard."
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(x-get-selection-internal 'CLIPBOARD 'STRING))
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(defun x-set-selection (type data)
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"Make an X Windows selection of type TYPE and value DATA.
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The argument TYPE (nil means `PRIMARY') says which selection, and
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DATA specifies the contents. TYPE must be a symbol. \(It can also
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be a string, which stands for the symbol with that name, but this
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is considered obsolete.) DATA may be a string, a symbol, an
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integer (or a cons of two integers or list of two integers).
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The selection may also be a cons of two markers pointing to the same buffer,
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or an overlay. In these cases, the selection is considered to be the text
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between the markers *at whatever time the selection is examined*.
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Thus, editing done in the buffer after you specify the selection
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can alter the effective value of the selection.
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The data may also be a vector of valid non-vector selection values.
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The return value is DATA.
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Interactively, this command sets the primary selection. Without
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prefix argument, it reads the selection in the minibuffer. With
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prefix argument, it uses the text of the region as the selection value ."
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(interactive (if (not current-prefix-arg)
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(list 'PRIMARY (read-string "Set text for pasting: "))
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(list 'PRIMARY (buffer-substring (region-beginning) (region-end)))))
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;; This is for temporary compatibility with pre-release Emacs 19.
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(if (stringp type)
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(setq type (intern type)))
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(or (x-valid-simple-selection-p data)
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(and (vectorp data)
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(let ((valid t)
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(i (1- (length data))))
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(while (>= i 0)
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(or (x-valid-simple-selection-p (aref data i))
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(setq valid nil))
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(setq i (1- i)))
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valid))
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(signal 'error (list "invalid selection" data)))
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(or type (setq type 'PRIMARY))
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(if data
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(x-own-selection-internal type data)
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(x-disown-selection-internal type))
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data)
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(defun x-valid-simple-selection-p (data)
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(or (stringp data)
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(symbolp data)
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(integerp data)
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(and (consp data)
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(integerp (car data))
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(or (integerp (cdr data))
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(and (consp (cdr data))
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(integerp (car (cdr data))))))
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(overlayp data)
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(and (consp data)
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(markerp (car data))
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(markerp (cdr data))
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(marker-buffer (car data))
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(marker-buffer (cdr data))
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(eq (marker-buffer (car data))
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(marker-buffer (cdr data)))
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(buffer-name (marker-buffer (car data)))
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(buffer-name (marker-buffer (cdr data))))))
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;;; Cut Buffer support
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(declare-function x-get-cut-buffer-internal "xselect.c")
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(defun x-get-cut-buffer (&optional which-one)
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"Returns the value of one of the 8 X server cut-buffers.
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Optional arg WHICH-ONE should be a number from 0 to 7, defaulting to 0.
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Cut buffers are considered obsolete; you should use selections instead."
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(x-get-cut-buffer-internal
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(if which-one
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(aref [CUT_BUFFER0 CUT_BUFFER1 CUT_BUFFER2 CUT_BUFFER3
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CUT_BUFFER4 CUT_BUFFER5 CUT_BUFFER6 CUT_BUFFER7]
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which-one)
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'CUT_BUFFER0)))
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(declare-function x-rotate-cut-buffers-internal "xselect.c")
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(declare-function x-store-cut-buffer-internal "xselect.c")
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(defun x-set-cut-buffer (string &optional push)
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"Store STRING into the X server's primary cut buffer.
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If PUSH is non-nil, also rotate the cut buffers:
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this means the previous value of the primary cut buffer moves to the second
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cut buffer, and the second to the third, and so on (there are 8 buffers.)
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Cut buffers are considered obsolete; you should use selections instead."
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(or (stringp string) (signal 'wrong-type-argument (list 'string string)))
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(if push
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(x-rotate-cut-buffers-internal 1))
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(x-store-cut-buffer-internal 'CUT_BUFFER0 string))
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;;; Functions to convert the selection into various other selection types.
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;;; Every selection type that Emacs handles is implemented this way, except
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;;; for TIMESTAMP, which is a special case.
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(defun xselect-convert-to-string (selection type value)
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(let (str coding)
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;; Get the actual string from VALUE.
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(cond ((stringp value)
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(setq str value))
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((overlayp value)
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(save-excursion
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(or (buffer-name (overlay-buffer value))
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(error "selection is in a killed buffer"))
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(set-buffer (overlay-buffer value))
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(setq str (buffer-substring (overlay-start value)
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(overlay-end value)))))
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((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(or (eq (marker-buffer (car value)) (marker-buffer (cdr value)))
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(signal 'error
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(list "markers must be in the same buffer"
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(car value) (cdr value))))
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(save-excursion
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(set-buffer (or (marker-buffer (car value))
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(error "selection is in a killed buffer")))
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(setq str (buffer-substring (car value) (cdr value))))))
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(when str
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;; If TYPE is nil, this is a local request, thus return STR as
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;; is. Otherwise, encode STR.
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(if (not type)
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str
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(setq coding (or next-selection-coding-system selection-coding-system))
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(if coding
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(setq coding (coding-system-base coding)))
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(let ((inhibit-read-only t))
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;; Suppress producing escape sequences for compositions.
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(remove-text-properties 0 (length str) '(composition nil) str)
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(if (eq type 'TEXT)
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;; TEXT is a polymorphic target. We must select the
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;; actual type from `UTF8_STRING', `COMPOUND_TEXT',
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;; `STRING', and `C_STRING'.
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(if (not (multibyte-string-p str))
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(setq type 'C_STRING)
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(let (non-latin-1 non-unicode eight-bit)
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(mapc #'(lambda (x)
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(if (>= x #x100)
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(if (< x #x110000)
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(setq non-latin-1 t)
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(if (< x #x3FFF80)
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(setq non-unicode t)
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(setq eight-bit t)))))
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str)
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(setq type (if non-unicode 'COMPOUND_TEXT
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(if non-latin-1 'UTF8_STRING
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(if eight-bit 'C_STRING 'STRING)))))))
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(cond
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((eq type 'UTF8_STRING)
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(if (or (not coding)
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(not (eq (coding-system-type coding) 'utf-8)))
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(setq coding 'utf-8))
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(setq str (encode-coding-string str coding)))
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((eq type 'STRING)
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(if (or (not coding)
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(not (eq (coding-system-type coding) 'charset)))
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(setq coding 'iso-8859-1))
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(setq str (encode-coding-string str coding)))
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((eq type 'COMPOUND_TEXT)
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(if (or (not coding)
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(not (eq (coding-system-type coding) 'iso-2022)))
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(setq coding 'compound-text-with-extensions))
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(setq str (encode-coding-string str coding)))
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((eq type 'C_STRING)
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(setq str (string-make-unibyte str)))
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(t
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(error "Unknow selection type: %S" type))
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)))
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(setq next-selection-coding-system nil)
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(cons type str))))
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(defun xselect-convert-to-length (selection type value)
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(let ((value
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(cond ((stringp value)
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(length value))
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((overlayp value)
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(abs (- (overlay-end value) (overlay-start value))))
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((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(or (eq (marker-buffer (car value))
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(marker-buffer (cdr value)))
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(signal 'error
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(list "markers must be in the same buffer"
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(car value) (cdr value))))
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(abs (- (car value) (cdr value)))))))
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(if value ; force it to be in 32-bit format.
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(cons (ash value -16) (logand value 65535))
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nil)))
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(defun xselect-convert-to-targets (selection type value)
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;; return a vector of atoms, but remove duplicates first.
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(let* ((all (cons 'TIMESTAMP (mapcar 'car selection-converter-alist)))
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(rest all))
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(while rest
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(cond ((memq (car rest) (cdr rest))
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(setcdr rest (delq (car rest) (cdr rest))))
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((eq (car (cdr rest)) '_EMACS_INTERNAL) ; shh, it's a secret
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(setcdr rest (cdr (cdr rest))))
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(t
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(setq rest (cdr rest)))))
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(apply 'vector all)))
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(defun xselect-convert-to-delete (selection type value)
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(x-disown-selection-internal selection)
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;; A return value of nil means that we do not know how to do this conversion,
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;; and replies with an "error". A return value of NULL means that we have
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;; done the conversion (and any side-effects) but have no value to return.
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'NULL)
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(defun xselect-convert-to-filename (selection type value)
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(cond ((overlayp value)
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(buffer-file-name (or (overlay-buffer value)
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(error "selection is in a killed buffer"))))
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((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(buffer-file-name (or (marker-buffer (car value))
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(error "selection is in a killed buffer"))))
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(t nil)))
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(defun xselect-convert-to-charpos (selection type value)
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(let (a b tmp)
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(cond ((cond ((overlayp value)
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(setq a (overlay-start value)
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b (overlay-end value)))
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((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(setq a (car value)
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b (cdr value))))
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(setq a (1- a) b (1- b)) ; zero-based
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(if (< b a) (setq tmp a a b b tmp))
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(cons 'SPAN
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(vector (cons (ash a -16) (logand a 65535))
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(cons (ash b -16) (logand b 65535))))))))
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(defun xselect-convert-to-lineno (selection type value)
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(let (a b buf tmp)
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(cond ((cond ((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(setq a (marker-position (car value))
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b (marker-position (cdr value))
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buf (marker-buffer (car value))))
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((overlayp value)
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(setq buf (overlay-buffer value)
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a (overlay-start value)
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b (overlay-end value)))
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)
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(save-excursion
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(set-buffer buf)
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(setq a (count-lines 1 a)
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b (count-lines 1 b)))
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(if (< b a) (setq tmp a a b b tmp))
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(cons 'SPAN
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(vector (cons (ash a -16) (logand a 65535))
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(cons (ash b -16) (logand b 65535))))))))
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(defun xselect-convert-to-colno (selection type value)
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(let (a b buf tmp)
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(cond ((cond ((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(setq a (car value)
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b (cdr value)
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buf (marker-buffer a)))
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((overlayp value)
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(setq buf (overlay-buffer value)
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a (overlay-start value)
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b (overlay-end value)))
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)
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(save-excursion
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(set-buffer buf)
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(goto-char a)
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(setq a (current-column))
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(goto-char b)
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(setq b (current-column)))
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(if (< b a) (setq tmp a a b b tmp))
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(cons 'SPAN
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(vector (cons (ash a -16) (logand a 65535))
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(cons (ash b -16) (logand b 65535))))))))
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(defun xselect-convert-to-os (selection type size)
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(symbol-name system-type))
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(defun xselect-convert-to-host (selection type size)
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(system-name))
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(defun xselect-convert-to-user (selection type size)
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(user-full-name))
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(defun xselect-convert-to-class (selection type size)
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"Convert selection to class.
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This function returns the string \"Emacs\"."
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"Emacs")
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;; We do not try to determine the name Emacs was invoked with,
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;; because it is not clean for a program's behavior to depend on that.
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(defun xselect-convert-to-name (selection type size)
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"Convert selection to name.
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This function returns the string \"emacs\"."
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"emacs")
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(defun xselect-convert-to-integer (selection type value)
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(and (integerp value)
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(cons (ash value -16) (logand value 65535))))
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(defun xselect-convert-to-atom (selection type value)
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(and (symbolp value) value))
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(defun xselect-convert-to-identity (selection type value) ; used internally
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(vector value))
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(setq selection-converter-alist
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'((TEXT . xselect-convert-to-string)
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(COMPOUND_TEXT . xselect-convert-to-string)
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(STRING . xselect-convert-to-string)
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(UTF8_STRING . xselect-convert-to-string)
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(TARGETS . xselect-convert-to-targets)
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(LENGTH . xselect-convert-to-length)
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(DELETE . xselect-convert-to-delete)
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(FILE_NAME . xselect-convert-to-filename)
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(CHARACTER_POSITION . xselect-convert-to-charpos)
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(LINE_NUMBER . xselect-convert-to-lineno)
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(COLUMN_NUMBER . xselect-convert-to-colno)
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(OWNER_OS . xselect-convert-to-os)
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(HOST_NAME . xselect-convert-to-host)
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(USER . xselect-convert-to-user)
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(CLASS . xselect-convert-to-class)
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(NAME . xselect-convert-to-name)
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(ATOM . xselect-convert-to-atom)
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(INTEGER . xselect-convert-to-integer)
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(_EMACS_INTERNAL . xselect-convert-to-identity)
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))
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(provide 'select)
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;; arch-tag: bb634f97-8a3b-4b0a-b940-f6e09982328c
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;;; select.el ends here
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